CN202316054U - Fragment grinder for waste plastic bag - Google Patents

Abstract

The utility model discloses a shredder for waste plastic bags, which comprises a frame, a main shaft and a plurality of axial-flow crushing units. The frame includes a casing, and the casing includes a feeding port and a discharge port. The main shaft is supported by the frame through bearings, and the plurality of axial-flow crushing units are arranged between the feeding port and the discharging port of the inner cavity of the casing along the axial direction of the main shaft, and are driven by the main shaft. The utility model collides and crushes light and thin plastic bag fragments through a plurality of axial-flow crushing units, not only can crush the light and thin plastic bag fragments to about 2mm, but also can separate plastic fragments from garbage and sundries, and the processed materials It can be directly used as a raw material for wood-plastic composite materials.

Description

A waste plastic bag shredder

[technical field]

The utility model relates to waste plastic processing equipment, in particular to a waste plastic bag fragment shredder.

[Background technique]

White pollution is an image term for the phenomenon of refractory plastic waste polluting the environment. It refers to the use of all kinds of domestic plastic products made of polystyrene, polypropylene, polyvinyl chloride and other polymer compounds and is discarded as solid waste. Due to random littering, it is difficult to degrade and deal with, resulting in serious environmental problems in urban and rural areas. phenomenon of pollution.

The main sources of white pollution are food packaging, foam-filled packaging, fast food boxes, agricultural mulch and other light and thin plastics.

my country is one of the top ten plastic products producing and consuming countries in the world, and white pollution is becoming more and more serious. However, everyone is used to using plastic bags. Plastic bags have almost become a necessity in life. At present, there is no economical and practical substitute. Contains a lot of thin and light plastic.

The traditional way to deal with waste plastic waste is landfill or incineration. Incineration will produce a large amount of toxic gas and cause secondary pollution. Landfilling will take up a large space; the natural degradation of plastics takes more than a hundred years; the precipitation of additives pollutes soil and groundwater, etc.

As petroleum resources are dwindling, household waste containing light and thin plastics is also an available resource. The development trend of waste plastics treatment technology is recycling, and the separation and utilization of domestic waste requires more than 80% in the 12th Five-Year Plan, among which light and thin plastics are the most difficult problem to deal with. At present, municipal solid waste contains about 9% to 13% of discarded thin plastics, and most of the thin plastic bags contain sundries, which are difficult to directly utilize. In a waste treatment plant with a daily processing capacity of 1,000 tons, there are about 100 tons of discarded light and thin plastics in the garbage. It is calculated that 100-200kg of light and thin plastics are sorted by one person per day. It requires 500 to 1,000 manpower.

Since urban domestic waste is mostly packed in bags, urban domestic waste contains about 9% to 13% of discarded thin plastic bags, most of which are filled with sundries, and must be broken and unpacked before disposal, but the plastic pieces that are broken and unpacked cannot Direct use requires crushing. But frivolous plastic is flexible, and traditional shredder can't pulverize frivolous plastic bag fragment with impact, therefore, also does not have a kind of pulverizer that can pulverize frivolous plastic bag fragment at present.

[Content of the invention]

The technical problem to be solved by the utility model is to provide a pulverizer capable of pulverizing light and thin plastic bag fragments.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is, a waste plastic bag shredder, including a frame, a main shaft and a plurality of axial-flow crushing units, the frame includes a casing, the The casing includes a feed port and a discharge port, the main shaft is supported by the frame through bearings, and the plurality of axial-flow crushing units are arranged in the feed port and the discharge port of the inner cavity of the casing along the axis of the main shaft. Between the material ports, it is driven by the main shaft.

In the waste plastic bag shredder described above, each crushing unit includes a rotary cutterhead and a fixed cutterhead; the rotary cutterhead is fixed on the main shaft and driven to rotate by the main shaft, and the rotary cutterhead includes a plurality of fans Blades and a plurality of flying knives, the flying knives are fixed on the fan blades, facing the fixed cutter head; the fixed cutter head is fixed in the casing, and the fixed cutter head includes a plurality of guide vanes and a plurality of The fixed knife is fixed on the deflector and faces the rotating cutter head.

In the waste plastic bag shredder described above, the fixed cutter head of each crushing unit is close to the feeding port, and the rotating cutter head is close to the discharge port.

In the waste plastic bag shredder mentioned above, the included angle between the fan blade and the guide vane and the rotation plane of the rotary cutter head is 15-30°.

Above-mentioned waste plastic bag shredder, the rake angle of flying knife and fixed knife is 15-25 °, and blade angle is 25-40 °, and back angle is 30-45 °.

In the waste plastic bag shredder described above, the discharge port includes an air duct, the middle part of the air duct includes a downward garbage opening, and the rear end of the air duct includes an outlet for plastic fragments.

In the waste plastic bag shredder described above, there are 3-5 axial-flow crushing units.

The waste plastic bag fragment crusher of the utility model collides and crushes the light and thin plastic bag fragments through a plurality of axial flow crushing units, not only can crush the light and thin plastic bag fragments to about 2mm, but also can separate the plastic fragments and garbage The separated and processed materials can be directly used as raw materials for wood-plastic composites.

[Description of drawings]

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a structural schematic diagram of an embodiment of the waste plastic bag shredder of the utility model.

Fig. 2 is the front view of the fixed cutter head of the embodiment of the waste plastic bag shredder of the utility model.

Fig. 3 is a cross-sectional view taken along line A of Fig. 2 .

Fig. 4 is a front view of the rotary cutterhead of the embodiment of the waste plastic bag shredder of the utility model.

Fig. 5 is a top view of the rotary cutter head of the embodiment of the waste plastic bag shredder of the utility model.

Fig. 6 is a structural diagram of the fan blades and flying knives of the rotary cutter head of the embodiment of the waste plastic bag shredder of the utility model.

[Detailed ways]

In the embodiment of the utility model shown in Fig. 1 to Fig. 6, the waste plastic bag shredder comprises a casing 1, a main shaft 2 and 3 axial-flow crushing units installed on the frame, and the casing 1 includes Feeding port 101 and discharge port, main shaft 2 are supported on the casing 1 by front bearing 8 and rear bearing 9, and the front end of main shaft 2 is driven by belt pulley 7. Three axial-flow crushing units are arranged front and rear along the axial direction of the main shaft 2 between the feeding port 101 and the discharging port in the inner cavity of the casing 1 , and are driven by the main shaft 2 .

Each crushing unit includes a rotary cutter head 5 and a fixed cutter head 6 . The rotary cutterhead 5 is fixed on the main shaft 2 through the flat key 201, and is driven to rotate by the main shaft 2.

The rotary cutter head 5 includes 3 fan blades 501 and 3 flying knives 502 , the flying knives 502 are fixed on the fan blades 501 with 3 screws, and the blade faces the fixed cutter head 6 .

The fixed cutter head 6 is fixed in the inner cavity of the casing 1 through the outer ring 603. The fixed cutter head 6 includes three guide vanes 601 and three fixed knives 602. The fixed cutter 602 is fixed on the guide vanes 601 with three screws. , the blade is facing the rotary cutter head 5.

The fixed cutter head 6 of each pulverizing unit is installed in the front, close to the feeding port 101 , and the rotary cutter head 5 is installed in the back, near the discharge port 102 .

The included angle between the fan blades 501 of the rotary cutter head and the deflector 601 of the fixed cutter head and the rotation plane of the rotary cutter head 5 is 20°.

The rake angle of the flying knife 502 and the fixed knife 602 is 20°, the edge angle is 30°, and the back angle is 40°.

The discharge port includes an air duct 102, the middle part of the air duct has a downward garbage port 103, and the rear end of the air duct has a plastic chip outlet 104.

There are 3 axial-flow crushing units in this embodiment, and there may be 3-5 or more crushing units. The more crushing units, the finer the frivolous plastic bag fragments will be crushed.

Waste plastic bag fragments are input from the feed port 101 of the shredder. Due to the suction effect generated by the three fan blades of the rotary cutter head, the fed plastic bag fragments enter the axial-flow crushing unit and pass through multiple axial-flow crushing units. The collision and shearing of the unit can not only crush the light and thin plastic bag fragments to about 2 mm, but also separate the plastic fragments from the garbage; because the garbage is heavy, it falls from the garbage port 103 in the middle of the air duct, Lighter plastic fragments are blown out from the plastic fragment outlet 104 at the rear end of the air duct. The processed plastic fragments can be directly used as raw materials for wood-plastic composites.

Claims (7)

1. a waste plastic bag fragment pulverizer comprises frame, and described frame comprises casing; Described casing comprises spout and discharging opening; It is characterized in that, comprise the pulverizing unit of main shaft and a plurality of axial-flow type, described main shaft is supported through bearing by frame; The pulverizing unit of described a plurality of axial-flow type is disposed axially between the spout and discharging opening of chassis cavity, by main shaft drives along main shaft.

2. waste plastic bag fragment pulverizer according to claim 1 is characterized in that, each is pulverized the unit and comprises rotary head and fixation cutter head; Described rotary head is fixed on the main shaft, and by the main shaft driven rotary, described rotary head comprises a plurality of fan blade and a plurality of fly cutter, and described fly cutter is fixed on the fan blade, towards fixation cutter head; Described fixation cutter head is fixed in the casing, and described fixation cutter head comprises a plurality of flow deflectors and a plurality of stationary knife, and described stationary knife is fixed on the described flow deflector, towards rotary head.

3. waste plastic bag fragment pulverizer according to claim 2 is characterized in that, each pulverizes the fixation cutter head of unit near spout, and rotary head is near discharging opening.

4. waste plastic bag fragment pulverizer according to claim 2 is characterized in that, the angle with flow deflector and rotary head Plane of rotation of said fan blade is 15-30 °.

5. waste plastic bag fragment pulverizer according to claim 2 is characterized in that the anterior angle of fly cutter and stationary knife is 15-25 °, and the basil is 25-40 °, and relief angle is 30-45 °.

6. according to the described waste plastic bag fragment of arbitrary claim pulverizer in the claim 1 to 5, it is characterized in that described discharging opening comprises airduct, the airduct middle part comprises that downward rubbish mouth, the rear end of airduct comprise the plastic flakes outlet.

7. according to the described waste plastic bag fragment of arbitrary claim pulverizer in the claim 1 to 5, it is characterized in that the pulverizing unit of described axial-flow type is 3-5.

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